STRUCTURAL STUDIES OF ICES AT HIGH-PRESSURE

The development of the Paris-Edinburgh cell has extended the pressure range for neutron diffraction by a full order of magnitude to 25 GPa a nd has permitted the first neutron structural studies of ices over an extended pressure range. High-pressure structural studies on ice, ammo nia, methane, hydrogen sulphide and ammonia monohydrate have now been performed. The results reveal a wealth of new and unexpected phenomena , suggesting that the high-pressure structures of ices are much more c omplex than previously thought and establishing the importance of neut ron diffraction in this held. (C) 1998 Elsevier Science B.V. All right s reserved.